Samsung have been using this style LED connector for few years now
Usually good idea to test the LEDs before opening the panel to change them. I do this without the PSU stil connected. With this connector (white one) have to jam the LED tester probes in the very narrow thin slot where the PSU blade style male prong inserts into. I've done this on many Samsungs without problem until today...
The female terminal inside the white connector has fragile fingers that grabs onto the male blades on the PSU's black connector. If the LED tester probe spreads open the fingers (need to push the probe in with a little force to make contact) the fingers will no longer close around the PSU connector blades. Need to remove the white connector. De-pin the female terminals, squeeze the fingers tighter. De-pin also isn't easy, need a very narrow long tool to unlock the terminal pin and ideally 3 hands. I ripped 1 wire doing it by myself and required repair.
As if this is not enough, removing the LED wires ( to de-pin, repair wires etc) on this edge lit TV need to be retaped back carefully to ensure flat. Otherwise, will make a slight bump on the reflector paper and result in a light shadow (luckly only visible on solid light color screen tests)
Can't find the exact picture of the female prongs with fingers but looks similar to this. Instead of 1 tall finger in this pic, there are 2 shorter ones. And the fingers are much flimsy than this pic. Anyway, once spread open, need to de-pin prongs and squeeze the fingers tight again. PITA.
Does anyone know if its safe to leave PSU connected to the LED connector (not powered on of course) when testing backlight? It would make this a lot easier.
Usually good idea to test the LEDs before opening the panel to change them. I do this without the PSU stil connected. With this connector (white one) have to jam the LED tester probes in the very narrow thin slot where the PSU blade style male prong inserts into. I've done this on many Samsungs without problem until today...
The female terminal inside the white connector has fragile fingers that grabs onto the male blades on the PSU's black connector. If the LED tester probe spreads open the fingers (need to push the probe in with a little force to make contact) the fingers will no longer close around the PSU connector blades. Need to remove the white connector. De-pin the female terminals, squeeze the fingers tighter. De-pin also isn't easy, need a very narrow long tool to unlock the terminal pin and ideally 3 hands. I ripped 1 wire doing it by myself and required repair.
As if this is not enough, removing the LED wires ( to de-pin, repair wires etc) on this edge lit TV need to be retaped back carefully to ensure flat. Otherwise, will make a slight bump on the reflector paper and result in a light shadow (luckly only visible on solid light color screen tests)
Can't find the exact picture of the female prongs with fingers but looks similar to this. Instead of 1 tall finger in this pic, there are 2 shorter ones. And the fingers are much flimsy than this pic. Anyway, once spread open, need to de-pin prongs and squeeze the fingers tight again. PITA.
Does anyone know if its safe to leave PSU connected to the LED connector (not powered on of course) when testing backlight? It would make this a lot easier.